Copy+ allows you to copy as often as you want before pasting. Just activate it and start to copy. Copy Plus saves your clips and shows how many there are in its task bar icon.

When you are ready to paste, just click on the Copy Plus icon in your task bar, select the spacing you want between clips and click paste. You can paste the cache of clips as often as you like. The cache is emptied and restarts the first time you copy after pasting.